Field Wiring - LG Multi V IV PRHR041 Installation Manual

26

Field Wiring

Single outdoor unit
Outdoor
Power supply
(3Ø 4wires)
[Outdoor Unit]
(Main Switch)
R S T N
Switch
Fuse
Indoor
Power supply
(1Ø 2wires)
L N
Power Line
(4 Wires Cable)
Power Line
(2 Wires Cable)
Pull Box Pull Box Pull Box
(Installer option) (Installer option) (Installer option)
HR unit
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
WARNING
!
• Indoor Unit ground wires are required for preventing electrical
shock accident during current leakage, Communication disorder by
noise effect and motor current leakage (without connection to
pipe).
• Don't install an individual switch or electrical outlet to disconnect
each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an
integrated manner because this system consists of the equipment
utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, mo-
mentary blackout or the power goes on and off while the product is
operating, attach a reversed phase protection circuit locally. Run-
ning the product in reversed phase may break the compressor and
other parts.
Between Indoor and Master Outdoor unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2
3 4 3 4
HR unit
Series outdoor units
When the power source is connected
In series between the units.
Outdoor
Power supply
(3Ø 4wires)
[Master]
(Main Switch)
R S T N
Switch
Fuse
Indoor
Power supply
(1Ø 2wires)
N
L
Power Line
(4 Wires Cable)
Power Line
(2 Wires Cable)
Pull Box Pull Box Pull Box
(Installer option) (Installer option) (Installer option)
HR unit
Power Line Power Line Power Line
(2 Wires Cable) (2 Wires Cable) (2 Wires Cable)
Voltage range(V)
Frequency
Outdoor Indoor
60Hz 380V
50Hz 380-415V 220-240V
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
Master
GND 12V
Outdoor Unit
The GND terminal at the
main PCB is a '-' terminal
3 4
for dry contact, it is not
the point to make ground
connection.
Voltage range(V)
Frequency
Outdoor Indoor
60Hz 380V
50Hz 380-415V 220-240V
[Slave1] [Slave2] [Slave3]
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
WARNING
!
When the total capacity is over than as follow, the power source
do not use in series between the units.
The First terminal block could be burnt out. (Heat Pump : 62 Hp)
220V
When the power source is supplied to Each outdoor unit individually.
Outdoor
Power supply
(3Ø 4wires)
(Main Switch)
R S T N R S T N
Switch Switch
Fuse Fuse
Indoor
Power supply
(1Ø 2wires)
N
L
Power Line
(2 Wires Cable)
Power Line
(4 Wires Cable)
Voltage range(V)
Frequency
Outdoor
60Hz 380V
50Hz 380-415V 220-240V
WARNING
!
• Indoor Unit ground wires are required for preventing electrical
shock accident during current leakage, Communication disorder by
noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect
each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an
integrated manner because this system consists of the equipment
utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, mo-
mentary blackout or the power goes on and off while the product is
operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor
and other parts.
Between Indoor and Master Outdoor unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1
3 4 3 4
HR unit
220V
The GND terminal at the main PCB is a '-' terminal for dry contact.
It is not the point to make ground connection.
- Make sure that terminal number of master and slave outdoor units
are matched.(A-A,B-B)
[Master] [Slave1]
R S T N R S T N
Switch Switch
Fuse Fuse
Pull Box Pull Box Pull Box Pull Box
(Installer option) (Installer option) (Installer option) (Installer option)
HR unit
Power Line Power Line Power Line Power Line
(2 Wires Cable) (2 Wires Cable) (2 Wires Cable) (2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
Indoor
220V
Master
DRY2 GND 12V
Outdoor Unit SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A
3 4
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A
[Slave2] [Slave3]
Communication Line
(2 Wires Cable)
Master
DRY1 DRY2 GND 12V
Outdoor unit
Slave1
DRY1 DRY2 GND 12V
Outdoor Unit
Slave2
DRY1 DRY2 GND 12V
Outdoor Unit
Slave3
DRY1 DRY2 GND 12V Outdoor Unit